Production of 4He and anti-4He in Pb–Pb collisions at √sNN = 2.76 TeV at the LHC

ALICE Collaboration

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Results on the production of 4He and anti-4He nuclei in Pb–Pb collisions at √sNN = 2.76 TeV in the rapidity range |y|<1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0–10% central events are found to be dN/dyHe4=(0.8±0.4(stat)±0.3(syst))×10−6 and dN/dyanti-He4=(1.1±0.4(stat)±0.2(syst))×10−6, respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (Tchem=156MeV) as for light hadrons. The measured ratio of anti-4He/4He is 1.4±0.8(stat)±0.5(syst).
Original languageEnglish
Pages (from-to)1-20
Number of pages20
JournalNuclear Physics A
Early online date27 Dec 2017
Publication statusPublished - Mar 2018


  • Pb–Pb collisions
  • ALICE detector
  • LHC
  • Anti-nuclei


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